Process of producing divinyl.



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:e'nrrz HOFMANN AND CARL COUTELLE, or ELBERF LD, GERMANY, ASSIGNORS 'roFABBENFABRIKEN VORM. FRIEDR. BAYER & 00., or ELBERFELD, GERMANY, A

CORPORATION OF GERMANY.

I rnocnss or rnonucme mvrmrn.

No Drawing.

To all whom it may concern:

i CARL 'COUTELLE, doctors of philosophy,

vented new and useful Improvements in.

ammonium bases, and it comprises a process chemists, citizens of theGerman Empire, residing at Elberfeld, Germany,'have in- Processes forProducing Divinyl, of which thejollowing is a specification.

In our application Ser. No. 541761, filed February 3,1910, we havedescribed our new process of producingv divinyl (erythrene)v by completealkylation of tetramethylenediamin and by decomposing the thus obtainedquaternary ammonium bases.

The present invention-relates to improvements in this process, and moreparticularly in the step of decomposing the quaternary in which suchdecomposition is effected by means of alkalis, such as caustic soda.

In order to illustrate the new process more fully the following exam leis given, the parts being by weight':1 6 parts of tetramethylenediamin,1160 parts of a 28 per cent. caustic soda lye and 700 parts ofmethylchlorid are heated in an autoclave for 6 hours to 7080. The massof th reaction is mixed with 600 parts of a 2 per' cent. caustic sodalye and distilled. The distillate is most advantageously collected in aseparatory funnel, which removes the aqueous trimethylamin. The gaseousdivinyl is washed with diluted sulfuric acid and dried over calciumchlorid.

Specification of Letters Patent.

to the following formulae:

CH9.N(GH3)3C1 5, dnimcnaacl cm Instead of CH Cl other halogen alkyls maybe used, e.-g.,'-OH I,' etc. The process can also be carried out withoutressure by slowly introducing, 16. g., the 5101-1 into the mixture Iwhile stirring. Instead of NaOH other alkalis, e. g-., KOH, Ba(OH) vPatented J line 11, 1912. 7 Application filed July 6, 1911. Serial No.637,208. I

The process probably proceeds according

